"What is to be, will be—so never mind about the future."
This is about the poorest reasoning that Satan could possibly bring up, for it certainly comes from him for the purpose of taking souls down to hell. And yet some people are so foolish as to conclude that, "If I'm to be saved, I will be saved, and if I'm to be lost, I will be lost. What is to be, will be!"
Do people ever show such stupidity in the affairs of this life? Does the workman, for instance, sit down on Monday morning and say, "There's no need for me to work, for if I'm to get a paycheck, I'll get it. What is to be, will be."
Or can you imagine the farmer sitting comfortably in the house while his fields are growing up in weeds and assuring himself that if there is to be a fine crop of wheat at harvest, there will be one, for "what is to be, will be"?
If that farmer waits in that way till harvest time he will find a crop of weeds and nothing more, for he will reap just what he sows. And that is the exact truth which God is telling us in His Book: "Whatsoever a man soweth, that shall he also reap." Gal. 6:7. If you neglect "so great salvation" you will surely reap the "wages of sin" in a dark eternity.
Be wise now, and just receive "the gift of God" which is eternal life (Rom. 6:23) and you will find that "What is to be" will be your salvation and eternal life with Christ in glory.